South Australia (SA1) experienced a moderate price spike reaching $680.7/MWh during the 06:05 interval on 24 June 2026, with elevated prices persisting across three consecutive intervals before returning to baseline levels. The spike occurred during early morning hours with mixed renewable and thermal generation contributing to the supply mix, followed by rapid price normalisation within 15 minutes.
The price spike was driven by a binding constraint with exceptionally high marginal value ($7.308 million) identified as T_BLINK_TV_NGZ, indicating severe scarcity conditions in a critical transmission pathway. Additional binding constraints related to thermal generation limits (F_S++TBTU series and F_S+TBTU_R1) with marginal values ranging from $14.87 to $49.96/MWh contributed to sustained elevation, suggesting supply-side restrictions during a period when gas-fired generation was heavily relied upon (789 MW combined CCGT and OCGT) while renewable output was moderate.
Causal analysis generated by gridIQ's synthesis model from live AEMO market data: dispatch prices, generation mix, interconnector flows and market notices in the interval surrounding the event.